We report on a non-perturbative determination of the parameters of the lattice Heavy Quark Effective Theory (HQET) Lagrangian and of the time component of the heavy-light axial-vector current with Nf=2 flavors of massless dynamical quarks. The effective theory is considered at the 1/mh order, and the heavy mass mh covers a range from slightly above the charm to beyond the beauty region. These HQET parameters are needed to compute, for example, the b-quark mass, the heavy-light spectrum and decay constants in the static approximation and to order 1/mh in HQET. The determination of the parameters is done non-perturbatively. The computation reported in this paper uses the plaquette gauge action and two different static actions for the heavy quark described by HQET. For the light-quark action we choose non-perturbatively O(a)-improved Wilson fermions.
Bibliografisk note24 pages, 9 figures, 4 tables
Blossier, B., Morte, M. D., Fritzsch, P., Garron, N., Heitger, J., Simma, H., Sommer, R., & Tantalo, N. (2012). Parameters of Heavy Quark Effective Theory from Nf=2 lattice QCD. JHEP. https://doi.org/10.1007/JHEP09(2012)132